... for producing 2-layer or multiple-layer tri-side sealing composite film bag (for foods, laundry detergent, candies ... maling even-face, beautiful products with highly strong heating sealing.Technical para metersMoleHDL-500HDL-600Max.diameter of roll material600mm600mmMax ... rim charge, electrostatic elimination.7. Technology of double self-standing pouch, double concave-convex buckle device is in ...